读者在阅读中面临如何选择眼跳落点位置的问题。研究者在有词间空格的字母文字中（如英语和德语）发现人们倾向于将眼跳落在词中心偏左的位置,这个位置被称为偏好注视位置（preferred viewing location,PVL）。中文文本并没有空格来标记词边界信息,这使得中文阅读的眼跳目标选择机制更加复杂。近年来,研究者从中央凹—副中央凹动态调节的角度研究了阅读中眼跳目标选择的机制。结果发现在中文阅读中眼跳目标选择受到中央凹和副中央凹信息加工的共同影响,而副中央凹的加工直接决定了眼跳落点位置。

How do readers select a landing position when they make a saccade is an interesting and important question in cognitive psychology research. For alphabetic languages （i.e., English and German） which use blank spaces to segment words, readers usually make saccades to the preferred viewing location （PVL）, which is usually slightly to the left of the center of a word. For non-alphabetic languages like Chinese, however, the absence of obvious visual cues between words makes the selection of a landing position more complex. Recently, researchers have studied saccade target selection from the perspective of dynamic saccade adjustment based on foveal-parafoveal processing. They found that saccade lengths are influenced by the demands of on-going foveal and parafoveal processing. Moreover, the processing of parafoveal information directly determines the saccade lengths. However, more efforts are needed to understand precisely how saccade length is adjusted to accommodate foveal and parafoveal processing demands during the reading of both alphabetic and non-alphabetic languages.